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  3. Mineral Resource Data System (MRDS)

Unnamed (on David Island)

Occurrence in Alaska, United States with commodities Iron, Arsenic, Bismuth, Copper, Molybdenum, Lead, Antimony
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Alteration
  8. Mineral occurrence model information
  9. Nearby scientific data
  10. Economic information about the deposit and operations
  11. Mining district
  12. Links to other databases
  13. Bibliographic references
  14. General comments
  15. Reporter information

Geologic information

Identification information

Deposit ID 10308460
Record type Site
Current site name Unnamed (on David Island)

Geographic coordinates

Geographic coordinates: -156.48947, 57.03333 (WGS84)
Relative position This occurrence is located on David Island just offshore from Port Wrangell. Site location is accurate to within 1/2 mile.

Site location context

Political divisions (FIPS codes)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Ugashik A-2 SE(quadrangle 1:24,000 scale)

Ugashik S(quadrangle 1:100,000 scale)

Ugashik(quadrangle 1:250,000 scale)

Federal lands

Alaska Maritime National Wildlife Refuge(National Wildlife Refuge)

National Wildlife Refuge FWS(Type of land area)

FWS(Federal land areas administered by FWS)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Iron Primary
Arsenic Critical Secondary
Bismuth Critical Secondary
Copper Secondary
Molybdenum Secondary
Lead Secondary
Antimony Critical Secondary

Materials information

Materials Type of material
Pyrite Ore

Alteration

  • (Local) Silicification and other, undetermined, alteration.

Mineral occurrence model information

Model code 85
USGS model code 22c
Deposit model name Polymetallic veins
Mark3 model number 46

Nearby scientific data

(1) -156.48947, 57.03333
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Economic information

Comments on the geologic information

  • Geologic Description = This site is underlain by Miocene and Pliocene andesite and basalt flows, lithic tuffs, and breccias (Detterman and others, 1987). The rocks are locally silicified and exhibit other, undetermined alteration. Anomalous values in copper, molybdenum, and lead have been reported in samples of igneous rock (Wilson and O'Leary, 1986 ). A massive pyritic lode, 10 to 20 feet thick, is exposed at the wave base on the south side of a small point at the east end of the island and along the northeast shore (Church and others, 1989: B-1858). Grab samples of this material are anomalous in arsenic, bismuth, and antimony. Hydrothermal alteration is reportedly widespread along the northeast shore.

Economic information about the deposit and operations

Development status Occurrence

Comments on exploration

  • Status = Inactive

Mining district

District name Alaska Peninsula

Comments on the workings information

  • Workings / Exploration = The U.S. Geological Survey has geochemically sampled this occurrence (Church abd others, 1989, B-1858).

Reference information

Bibliographic references

  • Deposit

    Church, S.E., Frisken J.G., Wilson, F.H., 1989, Interpretation of exploration geochemical data from Ugashik, Bristol Bay, and western Karluk quadrangles, Alaska: U.S Geological Survey Bulletin 1858, 45 p.

Comments on the references

  • Primary Reference = Church and others 1989 (B-1859)

General comments

Subject category Comment text
Deposit Model Name = Polymetallic vein? (Cox and Singer, 1986; model 22c)
Deposit Other Comments = This site is on land selected by the Koniag Native Corporation.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-FEB-00 S.H. Pilcher U.S. Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Maps centered on this site

Authoritative Alaska resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.